Applications of Aminoplasts

For the manufacture of a diverse range of articles, the following properties of aminoplasts are very important possibility of being coloured, absence of small, superior hardness, good dielectric properties, a satisfactory resistance to the impact of water in the case of urea-formaldehyde aminoplasts and an excellent one for melamine-formaldehyde aminoplasts. 

Articles made of aminoplasts are practically unaffected by fats, oils, alcohol, acetones, and weak acids they retain dimensional stability, are not easily combustible and are endowed with good resistance to solvents and utility chemicals. The service temperature for aminoplasts of the KFA type is up to 90 °C, for type MFB aminoplasts — up to 120 °C. 

Melamine-formaldehyde materials cost 30-50% more than urea-formaldehyde ones. Today the world output of melamine-formaldehyde materials is about 25% of the total output of aminoplasts with a tendency to increase further because of the lowering of melamine prices. 

Aminoplasts based on melamine-formaldehyde oligomers have properties superior to urea-formaldehyde compositions and are widely used for the manufacture of domestic articles, electrotechnical products, machine components, etc. These articles have a hard, scratch-resistant surface and are stronger than those made of the KFA type aminoplasts. 

Buttons on underwear that are expected to possess high resistance to boiling solutions of washing agents and crockery (plates, cups) which must be resistant to the effects of hot water, soap and other washing agents are produced from aminoplasts based on melamine-formaldehyde resin with a cellulo filler [4]. 

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